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It indicates that we’re all using version three of the POP protocol. The “3”in POP3 turns out to be pretty boring. A “POP server” is the server holding your email. Thunderbird and Microsoft Office’s Outlook desktop program are two examples. POP - the post office protocol - is the language used between a computer fetching email (usually your computer, running an email program) and the computer holding your email (usually that of your email service provider or ISP).Ī “POP client” is a program fetching email. POP3 and IMAP are protocols (or “languages”) used to get your email, while SMTP is the protocol used to send it.īut why POP? Or POP3? And what are you supposed to enter if you’re asked to configure your email account in your email client?Ī communications “protocol” is just the language computers use to talk between themselves. POP3 and IMAP are half of the email puzzle SMTP is the other.

It’s useful to understand a few common acronyms, at least at a high level, to make using and configuring email programs a little less confusing. Outgoing mail (SMTP) server - requires TLS3 or SSL:  computer world is full of confusing acronyms, and email is one source of many. Incoming mail (POP3) server - requires SSL: Password: Your NetID password Setting Up POP Access Outgoing mail Use STARTTLS: Yes (some clients call this SSL)Īccount name: some Stony Brook users, their account name may be some other variation)Įmail Address: some Stony Brook users, their email address may be some other variation) Outgoing mail (SMTP) server:  (use authentication) Incoming mail (IMAP) server - requires SSL: Either turn it off or create a Gmail Application specific password for applications that connect via POP/IMAP. Note: If you have 2-step authentication set up on your Gmail account, you won't be able to setup Thunderbird with your mail.